Keyword Density Checker

What This Checker Actually Does: Two Real Input Modes

This tool runs in one of two modes you choose from the tabs above the input form. In TEXT mode, you paste raw article copy directly and the analysis happens entirely on your device — nothing leaves your browser. In URL mode, you provide a live web address and the tool attempts to actually fetch that page's real HTML so it can pull the title, meta description, headings, and image alt text alongside the body copy, then run the exact same word-frequency engine on the result.

Both modes feed the same underlying analyzer: text is lowercased, punctuation is stripped, split into individual words, and then re-grouped into one-, two-, three-, and four-word phrases (n-grams) so you can see repetition patterns at every phrase length, not just single keywords.

How URL Mode Actually Fetches a Live Page

Because browsers block a webpage from directly fetching the raw HTML of an arbitrary third-party site (a security rule called CORS), this tool routes the request through a public CORS proxy service first, and falls back to a second proxy if the first one is unreachable. Once the HTML comes back, it is parsed with the browser's native DOMParser to pull the real title, meta description, all heading tags, and all image alt attributes, exactly as they exist in that page's source.

If both proxy attempts fail — which can happen if a site blocks proxy traffic or a proxy service is temporarily down — the tool shows a clear on-screen error instead of pretending the scan succeeded. It never invents a fake result for your submitted URL. We explain this openly in the Limitations section below, and recommend switching to TEXT mode whenever a fully accurate result matters more than convenience.

Understanding One- to Four-Word Phrase Analysis

The Keyword Density panel lets you switch between four tabs: single keywords, two-word phrases, three-word phrases, and four-word phrases. Each tab recalculates frequency and density independently, since a word like "quran" might appear 28 times on its own while the exact three-word phrase "quran expert online" appears only 9 times — both numbers are real and both matter for different reasons. Single-word density shows raw topical repetition, while two-, three-, and four-word phrase density reveals whether you are naturally repeating a specific target phrase (good for ranking a specific query) or accidentally over-repeating one exact phrase in a way that reads as unnatural.

How the Target Keyword SEO Score Is Calculated

When you enter a Target Keyword in Advanced Settings, the tool checks six things: whether the phrase appears in the page title, the meta description, the H1 tag, any H2/H3 tags, image alt text, and whether its overall density falls in the optimal 0.5%-2% range. Each satisfied check contributes to the circular progress score shown next to the checklist, giving you a quick visual read on how well-optimized a page is around one specific target phrase rather than just its raw word count.

Who Uses a Keyword Density Checker

Content writers use TEXT mode to self-edit a draft before submitting it, catching accidental over-repetition of a phrase they didn't consciously notice while writing. SEO freelancers use URL mode to audit a client's published page against a target keyword, quickly seeing whether it's missing from the title or H1. Bloggers migrating old posts use it to spot outdated exact-match keyword stuffing patterns common in older SEO advice, so they can rewrite those sections more naturally. Students learning on-page SEO use the checklist and score panel as a hands-on way to see, concretely, what "optimizing around a keyword" actually looks like across title, description, headers, and alt text.

Honest Limitations of This Tool

URL mode depends on free, public CORS proxy services to fetch a page's HTML, and those services can be rate-limited, temporarily down, or blocked by a target site's own firewall — when that happens, the tool shows a clear "couldn't fetch this URL" error instead of your actual page, and you should switch to TEXT mode (pasting the page's real content directly) to get a guaranteed accurate result. The tool also has no concept of true semantic relevance the way a modern search engine's language models do — it counts literal word and phrase repetition, which is a useful proxy for over-optimization but is not the same thing as topical quality.

Tips for Getting the Most Useful Results

When auditing a live page, use TEXT mode with a straight copy-paste of your final published copy whenever accuracy matters more than convenience, since it removes any dependency on a third-party proxy succeeding. Set your Min Word Length filter higher (4 or 5) when you specifically want to ignore short filler words that survive stop-word filtering, and lower it back down when auditing shorter technical or product terminology. Always review the n-gram tabs beyond just single words — a healthy single-word density can still hide an over-repeated three- or four-word exact phrase that reads as unnatural to a human reader, so cross-check both views before deciding a page is truly balanced.

Common Problems and How to Fix Them

If a URL-mode scan shows a "Couldn't Fetch This URL" error, both CORS proxy attempts genuinely failed for that address — re-run the scan in case the proxy was temporarily overloaded, or switch to TEXT mode and paste the content directly for a guaranteed accurate reading. If your target keyword shows a 0% score despite clearly appearing on the page, double-check for exact spelling, hyphenation, or plural-versus-singular mismatches, since the checker looks for the literal phrase you typed. If the stop-word toggle seems to have no visible effect, confirm you haven't accidentally cleared the Custom Stop Words box in Advanced Settings, since an empty custom list combined with the toggle off will show fully raw, unfiltered word counts across every table on the page.

How Stop-Word Filtering Actually Works

The checker ships with a built-in list of roughly 150 common English stop words — pronouns, articles, prepositions, and conjunctions like "the," "and," "is," and "with" — pre-loaded directly into the Custom Stop Words textarea in Advanced Settings, where you can freely edit, remove, or add entries. With the "Filter common English Stop Words" toggle checked, any word matching that list is excluded before frequency and density are calculated, so your Top Keywords and n-gram tables reflect genuinely meaningful terms instead of being dominated by "the" or "and." Turning the toggle off shows completely raw, unfiltered word counts, which is occasionally useful for auditing content written in a different language or a technical niche where the default English stop-word list doesn't apply cleanly to specialized vocabulary or jargon.

Privacy: What Happens to Your Text

In TEXT mode, everything — lowercasing, punctuation stripping, word splitting, n-gram grouping, and density math — runs in plain JavaScript variables inside your own browser tab. Nothing you paste is transmitted anywhere, which makes TEXT mode the right choice for auditing an unpublished draft, an embargoed press release, or client copy under NDA. In URL mode, only the URL you type is sent onward (to the CORS proxy needed to fetch that page's public HTML) — the tool does not require or store any account, email, or personal identifier to run an analysis, and no results are saved server-side once you close the tab.